Chicago Midway International in January 2026

79.8%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In January 2026, reporting carriers scheduled 4,848 domestic departures from Chicago Midway International (MDW). 79.8% left less than 15 minutes late and 79.1% reached their destination on time; 2.1% were cancelled.

Nationally that month, 75.6% of flights departed on time and 75.3% arrived on time, so MDW departures were 4.2 points above the national departure figure.

A year earlier, in January 2025, the airport had 5,189 departures with 79.7% leaving on time: a change of +0.1 points, with flights down 7%.

Flights arriving at MDW that month were on time 80.8% of the time (4,854 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 40%, national aviation system 31% and late-arriving aircraft 25%.

On time 79.1%
Arrived 15+ minutes late 18.6%
Cancelled 2.1%
Diverted 0.1%

Every scheduled departure from MDW in January 2026, judged by arrival at the destination.

January 2026 against a year earlier, the airport's year and the nation

Measure	Jan 2026	Jan 2025	MDW, 12 months to Jul 2026	All reported flights, Jan 2026
Departed on time	79.8%	79.7%	70.7%	75.6%
Arrived on time	79.1%	80.4%	73.9%	75.3%
Cancelled	2.1%	2.0%	1.5%	4.7%
Average departure delay (late minutes only)	10.3 min	9.7 min	16.5 min	16.7 min
Scheduled departures a day	162	173	202	18,133
Scheduled departures	4,848	5,189	73,744	544,003

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	4,538	94%	80.0%	-0.4 min	2.1%
F9 Frontier Airlines	109	2%	56.9%	29.9 min	2.8%
DL Delta Air Lines	106	2%	78.3%	0.6 min	5.7%
OO SkyWest Airlines	85	2%	62.4%	30.7 min	0.0%
G4 Allegiant Air	10	0%	60.0%	17.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MDW–ATL	Chicago to Atlanta	279	78.1%	1.0 min	4.3%
MDW–MCO	Chicago to Orlando	211	78.2%	3.0 min	0.0%
MDW–PHX	Chicago to Phoenix	203	78.3%	3.5 min	0.0%
MDW–LGA	Chicago to New York	197	81.7%	-0.9 min	4.1%
MDW–MSP	Chicago to Minneapolis	186	73.7%	13.4 min	0.0%
MDW–DCA	Chicago to Washington	179	71.5%	4.8 min	6.1%
MDW–LAS	Chicago to Las Vegas	161	81.4%	0.0 min	0.0%
MDW–DEN	Chicago to Denver	158	81.0%	-0.4 min	0.0%
MDW–DAL	Chicago to Dallas	156	80.1%	-5.2 min	5.1%
MDW–MCI	Chicago to Kansas City	151	83.4%	1.7 min	0.7%
MDW–BNA	Chicago to Nashville	132	82.6%	-6.0 min	5.3%
MDW–HOU	Chicago to Houston	129	85.3%	-5.0 min	0.0%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), January 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jan 2026	Minutes
Air carrier	39.7%	37.3%	18,108
Late-arriving aircraft	24.8%	35.0%	11,288
National Aviation System	31.3%	18.0%	14,258
Extreme weather	3.9%	9.6%	1,761
Security	0.4%	0.1%	166

45,581 delay minutes on 904 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left MDW on time in January 2026?

79.8% of 4,848 scheduled domestic departures left less than 15 minutes late, and 79.1% reached their destination on time. The national figures that month were 75.6% and 75.3%.

How does that compare with a year earlier?

In January 2025, 79.7% of 5,189 departures left on time and 2.0% were cancelled, against 79.8% and 2.1% in January 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for January 2026; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for MDW · methodology · corrections.